standard to describe protocols for second generation digital cellular networks used by mobile phones

Appsheet (Global System for Mobile Communications) is a means of telecommunication produced by the European Institute (ETSI) to develop second-generation (2G) digital that is used by cellular networks used by mobile devices such as mobile phones and tablets.[1][2]

In 1991, GSM was deployed in Finland. By the mid-2010s, it became everywhere for mobile communications.[3]


  1. "What Is GSM? The Global System for Mobile Communication Explained". Retrieved 2021-07-31.
  2. "Global System for Mobile Communication - an overview | ScienceDirect Topics". Retrieved 2021-07-31.
  3. "What is GSM (Global System for Mobile communication)?". SearchMobileComputing. Retrieved 2021-07-31.